The subaru coronographic extreme AO (SCExAO) system: Implementation and performances of the coronographic low order WaveFront sensor

Frédéric Vogt, Frantz Martinache, Olivier Guyon, Takashi Yoshikawa, Kaito Yokochi, Vincent Garrel, Taro Matsuo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

The Subaru Coronagraphic Extreme AO project (SCExAO) is a high performance coronagraph designed to deliver high contrast at small angular separation. For the detection of structures near the diffraction limit, an accurate control of low order wavefront aberrations - tip-tilt and focus - is essential as these aberrations create light leaks that are the source of confusion in the final science image. To address this major difficulty, we have equipped SCExAO with a specially designed Coronagraphic Low Order WaveFront Sensor (CLOWFS) using defocused images of a reflective ring located in the focal plane, that can track tip-tilt errors as small as 10-3λ/D. CLOWFS was originally designed to drive actuators in a closed-loop. Here, we show that it can also be used in post-processing to efficiently subtract the tip-tilt induced coronagraphic leaks in the final science image.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7736
EditionPART 1
DOIs
StatePublished - 2010
Externally publishedYes
EventAdaptive Optics Systems II - San Diego, CA, United States
Duration: Jun 27 2010Jul 2 2010

Other

OtherAdaptive Optics Systems II
CountryUnited States
CitySan Diego, CA
Period6/27/107/2/10

Fingerprint

Tip-tilt
Wavefront Sensor
Wavefronts
Extremes
Aberrations
Aberration
aberration
sensors
Sensors
Coronagraph
coronagraphs
confusion
Focal Plane
Post-processing
Wave Front
Closed-loop
Diffraction
Actuator
Actuators
High Performance

Keywords

  • Adaptive optics
  • CLOWFS
  • Coronography
  • Extrasolar planets
  • PIAA
  • SCExAO
  • Subaru telescope

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Vogt, F., Martinache, F., Guyon, O., Yoshikawa, T., Yokochi, K., Garrel, V., & Matsuo, T. (2010). The subaru coronographic extreme AO (SCExAO) system: Implementation and performances of the coronographic low order WaveFront sensor. In Proceedings of SPIE - The International Society for Optical Engineering (PART 1 ed., Vol. 7736). [773612] https://doi.org/10.1117/12.857915

The subaru coronographic extreme AO (SCExAO) system : Implementation and performances of the coronographic low order WaveFront sensor. / Vogt, Frédéric; Martinache, Frantz; Guyon, Olivier; Yoshikawa, Takashi; Yokochi, Kaito; Garrel, Vincent; Matsuo, Taro.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7736 PART 1. ed. 2010. 773612.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Vogt, F, Martinache, F, Guyon, O, Yoshikawa, T, Yokochi, K, Garrel, V & Matsuo, T 2010, The subaru coronographic extreme AO (SCExAO) system: Implementation and performances of the coronographic low order WaveFront sensor. in Proceedings of SPIE - The International Society for Optical Engineering. PART 1 edn, vol. 7736, 773612, Adaptive Optics Systems II, San Diego, CA, United States, 6/27/10. https://doi.org/10.1117/12.857915
Vogt F, Martinache F, Guyon O, Yoshikawa T, Yokochi K, Garrel V et al. The subaru coronographic extreme AO (SCExAO) system: Implementation and performances of the coronographic low order WaveFront sensor. In Proceedings of SPIE - The International Society for Optical Engineering. PART 1 ed. Vol. 7736. 2010. 773612 https://doi.org/10.1117/12.857915
Vogt, Frédéric ; Martinache, Frantz ; Guyon, Olivier ; Yoshikawa, Takashi ; Yokochi, Kaito ; Garrel, Vincent ; Matsuo, Taro. / The subaru coronographic extreme AO (SCExAO) system : Implementation and performances of the coronographic low order WaveFront sensor. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7736 PART 1. ed. 2010.
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